Electrically-heated unit for heating liquids



B. w. MAcY ELECTRICALLY HEATED UNIT FOR HEATING LIQUIDS Filed March 20,1922 Patented Dec. 16, 1924.

UNITED STATES PATENT OFFICE.

BARNETT WRIGHT MACY, OF JACKSONVILLE, FLOR-IDA, ASSIGNOR TO ELECTRICHEATING CORPORATION, OF JACKSONVILLE, FLORIDA, A CORPORATION OF FLORIDA.

ELEGTRIOALLY-HEA'IED UNIT FOR HEATING LIQUIDS.

Application filed March 20, 1922. Serial No. 545,205.

To all whom it may concem:

Be it known that I, BARNETT WRIGHT MACY, a citizen of the United States,residing at Jacksonville, in the county of Duval and State of Florida,have invented certain new and useful Improvements .inElectrically-Heated Units for Heating Liquids, of which the following isa specification.

My said invention relates to an electric heating device comprising aheating unit for heating liquids. Such a unit may be utilized in varioussituations as, for example, to heat the liquid in a radiator, oil beingpreferred for this purpose.

It is an object of the invention to rovide a device of the characterdescr bed which shall be durable and effective, inexpensive tomanufacture and not liable to get out of order.

Referring to the accompanying drawings which are made a part hereof andon which similar reference characters indicate similar parts,

Figure 1 is an elevation of the device partly in section,

Figures 2, 3 and 4 indicate various situations in which the device of myinvention may be applied.

In the drawings 10 indicates a base member which is here .shown as screwthreaded for convenience in applying the same. The base member supportsacore 11 of insulating material which is secured to the base member by arod 12 composed of copper or other material forming a good conductor forelectricity. At its lower end this rod passes through an insulatingsleeve 13 and one or more washers 14 of insulating material, the latterbeing located in a hole extending through the base 10. Beneath thewasher a terminal 15 is attached to the rod by a nut 16.

Spaced from the rod 12 is another rod 17 passing through a hole in thescrew threaded extension of the base, this rod being surrounded by aninsulating sleeve 18 of fiber or other material. A terminal 19 isattached to the lower end of rod 17 by a nut and washer similar to thosepreviously described and the two terminals are connected by insulatingmaterial inthe usual manner and pass through a porcelain bushing 20 in ametallic plate 21 covering the lower recessed end of the base andattached thereto by screws 22 or other conventional means.

A heating element comprising a coiled wire 23- of low resistance alloyis wound spirally about the core 11 and is connected at its lower end tothe rod 17 by a nut 24 and insulating washers 25. At its upper end thewire is attached to a buss in the form of a ring 26 surrounding the coreor set in a groove of the same. A fuse 27 is wound about the upper endof the core and is attached at its lower end to the buss. At its upperend the fuse is attached to the rod 12 by connections here shown ascomprising a washer and a pair of lock nuts 28 above which is aporcelain spacer 29 held in place by another washer and a nut, thespacer 29 forming a protection to prevent grounding.

In Figure 2 is illustrated an application of my invention to a radiator30 of conventional type, the base 10 being shown as hexagonal in shapeand threaded into a hole at one end of the radiator, a portion of theradiator being broken away at 31 to show the heating unit. The heatingelement extends horizontally through the lower art of the radiator andpreferably throng all of the sections.

Figure 3 shows my device applied to a steam generator 32 comprising aVertical heating pipe extending into a reservoir 33, the ordinary waterlevel being indicated in dotted lines at 34 and a water level indicator35 being provided to show the same. The water enters througha pipe at36, passes up around the heated unit to the interior of the boiler andis vaporized. The water level is maintained at 34 in any convenient orpreferred manner and additional water may be supplied from the pipes 37and 38 as needed. The steam that is formed may escape at 39.

Figure 4 shows my device as applied be tween two pipe sections 40 and41, this being a convenient manner of supplying heat at any desiredportion in a pipe line or pipe system.

In the operation of my device which is primarily intended for use inliquids, the same will be entirely submerged and will ordinarily be inan upright position, to facilitate the natural movement of the fluidcurrents in the heated liquid. The wire is the liquid receives heatgenerated in the ing through the base connected to the heat wire andalso the heat due to the'resistance of the liquid to passage of currentbetween adjacent convolutions in the coil. Should the liquid becomeexhausted the fuse 27 will burn out instead of the entire coil beingdestroyed.

It will be evident to those skilled in the art that the device can bemodified in various ways and can be applied in various situations otherthan those illustrated within the spirit of my invention, the scope ofwhich is indicated in the appended claims.

Having thus fully described my said invention, what I clalm as new anddesire to secure by Letters Patent, is:

1. A heating unit'for liquids comprising a base, an insulating coreprojecting therefrom at one end, rods extending through the base, one ofsaid rods extending through the core and securing it in place, aresistance element connected to said latter rod at the outer end of thecore, said element surrounding said core and secured to the other rod atits opposite end, substantially as set forth.

2. An electrical heating unit comprising a base threaded at one end andhaving a depending skirt forming a recessed portion at the other end, acore extending from the threaded end, a heating element surrounding thecore, a rod extending through the base and core and connected to theheating element at its upper end, a second rod, extending element at itslower end, terminals within said recess attached to said rods and acover plate extending over said recess, substantially as set forth.

3. In an electrical heating unit for liquids, a screw-threaded base forsecuring the unit in place, said base having a recess, a remov ablemetallic plate covering the recess in the base and fastened to the baseby means of screws, and a porcelain bushing set in the plate, wherebyelectrical connections can be established with the terminals intherecess, substantially as set forth.

4.; In an electrical heating unit for liquids, a base having meansthereon for securing the unit in lace, a core extending from said base,a eating element surrounding said core, a rod connected to the heatingelement at its outer end extending through the base and core, a spacingelement secured on the outer end of said rod adjacent the outer end ofthe core, a second rod extending through the base connected to theheating element at its inner end, and terminals attached to said rods,substantially as set forth.

5. An electrical heating unit for liquids comprising a base, acylindrical core extending from said base, a band about said coreintermediate the ends thereof, terminals at each end of the core, acoiled wire of low resistance material having one end connected to theterminal adjacent the base and wound spirally about, said core and havinits opposite endconnected to said band, and a fuse wire wound about saidcore having one end connected to said band and its other end connectedto the outer terminal, substantially as set forth. I

6. An electrical heating unit for liquids comprising a base, acylindrical core extending from said base, a band about said coreintermediate the ends thereof, terminals at each end of the core, acoiled wire of low resistance material having one end connected to theterminal adjacent the base and wound spirally about said core and havingits opposite end connected to said band, a fuse wire wound about saidcore having one end connected to said band and its other end connectedto the outer terminal, and an insulating spacing element secured at theouter end of said coil, substantially as set forth.

In witness whereof, I have hereunto set.

my hand and seal at J acksonville, Florida,

this 10th day of February, A. .D. nineteen hundred and twenty-two.

BARNETT WRIGHTMAOY. [1 8.]

Witnesses:

. O. M. KEYS,

STANTON WALKER.

